Gatt had a costume fitting for the 2016 sequel Star Trek Beyond on 16 April 2015 but will not reprise his role as Science Officer 0718, according to a comment in a recent update from the Las Vegas convention in August of 2015. [4]

Gatt was born in Notting Hill, London, England and raised in Kensington, London. He attended the Sylvia Young Theater School and graduated from the Mountview Academy of Theater Arts. Gatt worked as model for print, television, and runway projects for Giorgio Armani in Europe and the United Kingdom. His face and body can be seen in ads for British Telecom, Levi's Dockers Jeans, Kenzo, Gucci, and Guess jeans and in magazines such as "Vogue UK" and "Entrepreneur".

Among his earliest acting work are the crime movie Plunkett & Macleane (1999), an episode of The Bill (1999), the television fantasy film Jason and the Argonauts (2000, with Frank Langella, Jolene Blalock, and Brian Thompson), and the drama Orpheus & Eurydice (2000). He also worked on the crime thriller Malicious Intent (2000), episodes of 999 (2001) and Being April (2002), and the Bollywood romance Kal Ho Naa Ho (2003) before he moved to Los Angeles, California in 2005.

Gatt's baldness stems from alopecia, an autoimmune disorder that makes his hair fall out. He is active in supporting the Children's Alopecia Project, which helps kids who have the disorder. [7]

Beside his work in film and television, Gatt is also a well known motion capture performer and worked on video games such as Driver 2 (2000), Driv3r (2004), 24: The Game (2006), SOCOM U.S. Navy SEALs: Fireteam Bravo 2 (2006), God of War II (2007) and its sequel God of War III (2010). The latter two games were written by Marianne Krawczyk and featured the voices of Clancy Brown, Malcolm McDowell, and Simon Templeman. More recently, he returned to this franchise for the sequel God of War: Ascension (2013).

After he lent his voice to the video game Elder Scrolls Online in 2014, he appeared as Thenn warg in three fourth season episodes of the fantasy series Game of Thrones (2014). He was also interviewed for the fourth season special "Behind the Battle for the Wall". Gatt had recurring roles in episodes of Teen Wolf (2014) and The 100 (2014) and was featured in the thriller Finders Keepers (2014, with Marina Sirtis).

More recently, Gatt appeared in episodes of Strike Back (2015), Ray Donovan (2015, with Paula Malcomson), True Detective (2015), and Real Rob (2015) and in the adventure movie The Most Dangerous Game (2015).

He completed filming on the television science fiction film Stormageddon (2015), the action film For All Eyes Always (2015), the television comedy Mr. Hollywood (2015, with Tommy "Tiny" Lister, Jr.), and the thriller Finding Eden (2015).

Most recently, Gatt has been filming several scenes for a major part for the upcoming superhero show Lucky Man, developed by Stan Lee for Sky 1. [8] In pre-production is the horror thriller Liberty (2015, with Ben Cross) and announced are the projects Infrared (2015) and Harnessing the Rain (with John Savage).